US4101333A - Method of mine backfilling and material ...

A method of backfilling in underground mine operations by a mill tailings slurry which is dewatered to provide a material with a controlled water content to permit the dewatered material to be used as a backfill without requiring any substantial dewatering after placement and which material can, when desired, be mixed with selected quantities of cement to provide a mortar …

Numerical evaluation of segmental tunnel lining with …

To advance the shield machine without load, concrete segments are assembled in the mining tunnel, and the interspace between the segments and shotcrete is filled. Therefore, a composite lining composed of a concrete segment, backfill layer, and primary support is constructed in this section. Voids can occur in the backfill layer during grouting.

Subsidence prediction method of solid backfilling mining ...

10%Backfill mining, other filling mining methods, or sectional filling is the preferred means to exploit coal resources buried under buildings, water bodies, and railways as well as the best method to recover coal pillars under industrial squares. Therefore, the research results reported in this paper are significant for similar coal mines all ...

The Recent Progress China Has Made in the Backfill …

in china, mining researchers define the whole backfill (or filling) process in stope (or goaf) as follows [ 9 ]: after the qualified filling slurry is prepared on the surface, it is generally entered into the roadway of the main and auxiliary production system by the surface or filling borehole, and then transferred to the filling patio at the …

An Innovative Method for Placement of Gangue Backfilling ...

An Innovative Method for Placement of Gangue Backfilling Material in Steep Underground Coal Mines ... Yuan Jing; Affiliations Yanchun Yin State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China ...

Method of mine backfilling and material therefor - Joy ...

A method of backfilling in underground mine operations by a mill tailings slurry which is dewatered to provide a material with a controlled water content to permit the dewatered material to be used as a backfill without requiring any substantial dewatering after placement and which material can, when desired, be mixed with selected quantities of cement to provide a mortar …

Improving backfill efficiency and worker safety in ...

The mine had been using an open stope, retreat mining method to extract gold ore. The open stopes ranged from 500 cubic metres to 2,700 cubic metres, with an average size of 1,500 cubic metres, requiring between 100,000-110,000 cubic metres of backfill per year.

(PDF) Varna, Bulgaria IMPROVEMENT OF CURRENT MINING ...

New mining technology A number of options were elaborated for different mining methods and different ways of backfilling [12]. In Fig.1 is presented a scheme of advanced room-and-pillar mining technology with backfill in condition of Estonian oil shale mines.

Cemented Backfilling Mining Technology for Gently …

10%Backfill-strip mining is proposed as a sustainable mining method to address the shortage of backfill material and high filling costs at present. The overlying strata in backfill-strip mining are mainly supported by the combined support pillar (CSP) of the residual coal pillar and the filling body.

Mine Backfill - MiningInfo - Google Search

Mine backfill is defined as the material or materials used to fill the cavities created by mining so as to establish and retain safe working conditions, economically. Recently, mine backfill is employed in strategies to reduce surface environmental impacts. Mining Methods Employing Mine Backfill. Mining Methods Requiring Backfill.

Mine backfilling Research Papers - Academia.edu

The systems approach to backfill design is one where the backfilling needs of the mining methods at a given mining operation are matched to the available waste materials at the mine site. This means identifying the best backfill system that meets all of the technical requirements of the backfill at the lowest practical cost.

Underground Mining Methods: Engineering Fundamentals and ...

Underground Mining Methods presents the latest principles and techniques in use today. Reflecting the international and diverse nature of the industry, a series of mining case studies is presented covering the commodity range from iron ore to diamonds extracted by operations located in all corners of the world. Industry experts have contributed 77 chapters.

Overview of Solid Backfilling Technology Based on Coal ...

It could reach 85% by using the pillarless mining method of solid dense backfilling mining with retained gateways along goaf. Moreover, the length of service increased from the original duration of less than 40 years to around 100 years. The solid backfilling mining was …

Engineering design and application of solid backfill ...

The practicable trial of Jining No.3 coal mine using the solid backfill mining method can provide a reference for mining under the similar conditions. Discover the …

Minerals | Free Full-Text | A Method of Backfill Mining ...

The traditional backfill mining method is a technology developed by the general trend of green coal mining, but with a high cost and an impact on production efficiency. This paper proposes a structured backfill mining method with high-water materials and pillars.

Backfill – Key Properties - Paterson & Cooke

The mining method may dictate what fill types are applicable. For example, the Avoca mining method cannot be undertaken using a hydraulic fill, and uncemented rock fill cannot be placed in open stopes which will be exposed vertically unless rib pillars or other means of confinement are applied to prevent the waste from cascading into the void ...

INVESTIGATION OF CEMENTED TAILINGS BACKFILL AND …

strength of the backfilling material after 7 days, 14 days, and 28 days were the main objective of this thesis. The freestanding vertical face of the void space by inclined stope method was calculated. Specimens were made with Portland cement as the first binder, which was composed of 6%, 8%, and 10% of the solid content of the mixture and 20%

[PDF] A Review of Underground Mine Backfilling Methods ...

Mining industry is a demanding sector for human advancement. Scarcity of economic minerals near to ground surface has increased deep underground mining. Safety and environmental factors have caused mining companies consider backfilling of mine wastes to avoid mine collapse in further and deeper extraction phases, ground subsidence in mine abandoning and …

US3440824A - Method and apparatus for backfilling and ...

Method and apparatus for backfilling and underpinning an underground coal or ore mine Download PDF Info Publication number US3440824A. US3440824A US3440824DA US3440824A US 3440824 A US3440824 A US 3440824A US 3440824D A US3440824D A US 3440824DA US 3440824 A US3440824 A US 3440824A Authority US United States Prior art …

Stability Evaluation of Layered Backfill Considering ...

Cemented paste backfill (CPB) is the primary solution to improving the safety of continuous mining. The interaction between rock mass and backfill is an important indicator of backfill stability. The creep behavior of weak rock mass is an essential factor, which causes the evolution of stresses and displacements in the backfill stope. In this paper, numerical models …

Integrated green mining technology of "coal mining-gangue ...

Second, key backfilling equipment was developed at mining heights of 2.2 and 3.5 m by backfilling system layout and precise stratum control methods in Tangshan Mine. After real-time monitoring of stope pressure, backfilling effect, and surface deformation, we evaluated the implementation effect of mining, washing, and backfilling technology.

Analysis and Application of Backfill Mining in Thin Coal ...

Backfill mining can be regarded as a method for replacing coal with backfill material. In the gob area, the backfill height after full compression must be lower than the actual mining height, the backfill rate is less than . Therefore, the backfill mining is equivalent to limited thickness extraction, and the unfilled height is the limited

Investigation on Dynamical Mechanics, Energy Dissipation ...

As mining depth increases, the backfill mining method is more and more widely used in underground mines. The dynamic load generated by the blasting can affect the stability of the cemented tailings backfill (CTB). The CTB samples were prepared to conduct a test of the split Hopkinson pressure bar (SHPB) to investigate the dynamic disturbance of CTB.

Surrounding Rock Movement of Steeply Dipping ... - …

the backfill mining method can not only control the strata movement and surface subsidence, improve the "three under" coal resource recovery and solve the problem of gangue discharge, but can also effectively inhibit the dynamic phenomenon of the coal seam, roof and floor, slow down the mine pressure behavior, effectively inhibit the movement and …

Experimental study on the mechanical properties and ...

The author's research team applies MICP technology in backfilling applications of underground mining operations, with the method displaying significantly reduced environmental impact when compared to traditional methods because of …

Minerals | Free Full-Text | A Method of Backfill Mining ...

The traditional backfill mining method is a technology developed by the general trend of green coal mining, but with a high cost and an impact on production efficiency. This paper proposes a structured backfill mining method with high-water materials and pillars. The evolution of roof pressure appearance is assessed through the sensor and monitoring system …

Study on the Slope Stability of Mine Wall in Open Pit ...

backfill of Cut-and-Backfill mining. The simulation of coal seam excavation under the mine wall, which has studied the slope stability of the coal was excavated and then uses paste backfilling, by using the Cut-and-Backfill mining method and analysis of the influence of coal mining under the mine wall that affecting the slope.

Backfill - QueensMineDesignWiki

Mine backfill is soil, overburden, mine tailings or imported aggregate material used to replace excavated zones created by mining operations. Mine fill is an integral component of mines' design and method with many operations utilizing backfill as a means to aid the stabilization of mining-related voids and the disposing of mining wastes.

New Backfill Binder and Method

This paper describes a new mine backfill method based on a newly invented binder with several years of test results from laboratory and on- site applications. The new binder has several advantages over traditional Portland and slag cement binders. One tonne of the new binder can replace two to three tonne of Portland cement when used to consolidate backfill and can …

-A study on the mining method …

;This article analyzes the mining method of chamber backfilling of Jinchanggouliang Gold Mining by comparison, indicates the problems in the application of said method in respect of bottom structure, dilution management and backfilling, and gives the solutions for reference.