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Method for controlling wall rock of fully mechanized coal face goaf side coalbed laneway

A technology for gobs and fully-mechanized caving faces, which is applied to mining equipment, earthwork drilling, and installation of bolts, etc., and can solve the problem that the mining of fully-mechanized caving faces hinders the ability of fully-mechanized caving equipment, reduces the recovery rate of fully-mechanized caving mining, and wastes coal resources. and other problems, to achieve the effect of reducing the cost of roadway support, reducing the labor intensity of workers, and improving the efficiency of tunneling

Inactive Publication Date: 2008-02-13
CHINA UNIV OF MINING & TECH
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Problems solved by technology

For a long time, large coal pillars (about 30m) have been adopted for the side coal seam roadways in the goaf of fully mechanized caving working faces. Waste, how to improve the recycling rate of this non-renewable resource has become a concern of the whole industry
The support of fully mechanized caving mining roadway, especially the gob-side excavation roadway, mostly adopts wooden sheds, metal brackets and other support methods, and there are also reports of bolt support, but the cost is high in application and the support effect is poor , the deformation of the roadway is serious, which affects the mining of the fully mechanized caving face and hinders the full use of the fully mechanized caving equipment.

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  • Method for controlling wall rock of fully mechanized coal face goaf side coalbed laneway
  • Method for controlling wall rock of fully mechanized coal face goaf side coalbed laneway
  • Method for controlling wall rock of fully mechanized coal face goaf side coalbed laneway

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Embodiment Construction

[0014] Embodiments of the present invention will be further described below in conjunction with accompanying drawings:

[0015] The method for surrounding rock of the present invention to control the side coal seam roadway in the goaf of fully mechanized caving face is as follows:

[0016] 1. Stability analysis of large structure of overlying rock mass

[0017] 1. Taking a coal mine as an example, according to the geological data of the fully-mechanized caving face measured in the coal mine and the mine pressure data of the adjacent mining face, it is known that the average buried depth of roadway 4 is 500m, the average coal thickness is 8.28m, and the coal seam dip angle is 3 ~7°, the joints and fissures of the coal seam are developed, which belongs to the weak and broken coal seam. The cohesion of the coal seam is 2.2Mpa, the internal friction angle is 20°, and the density is 1.5g / cm 3 . The top of the coal seam is 0.2m thick gray mudstone, 2.06m thick gray black siltston...

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Abstract

A method for controlling the surrounding rock of the side coal seam roadway in the goaf of the fully-mechanized caving face. According to the geology of the fully-mechanized caving face measured on site and the mine pressure data of the adjacent mining face, the stability of the large structure of the overlying rock mass on the roadway is analyzed. Determine the width of the narrow coal pillar reserved on the side of the goaf, so that the roadway is located in the area of ​​relatively low vertical stress in the coal body, and the high-performance bolt support that controls the surrounding rock of the roadway forms a small load-bearing structure in the surrounding rock in the anchorage area . The small structure can make full use of the surrounding rock's own bearing capacity, and has strong adaptability to the deformation of the surrounding rock, ensuring smooth roadway support without repair, low bolt support cost, fast speed, and low labor intensity; it is compatible with large coal pillar roadway protection Compared with the narrow coal pillar protection roadway, the method reduces the loss of coal resources, improves the recovery rate of fully mechanized caving mining, and has good economic and social benefits.

Description

technical field [0001] The invention relates to a method for controlling the stability of the surrounding rock of a coal seam roadway, which is suitable for controlling the stability of the surrounding rock of a coal seam roadway along the side of a goaf in a fully mechanized caving working face. Background technique [0002] Fully mechanized top-coal caving mining technology has become an important technical means for high-yield and high-efficiency coal mines in my country and an important development direction of coal mining technology. The basic theoretical research on the surrounding rock control of fully mechanized caving pits has achieved great results, but there are few studies on the stability control of gob side roadways in fully mechanized caving faces, which has become the main factor restricting the further development of fully mechanized caving technology. For a long time, large coal pillars (about 30m) have been adopted for the side coal seam roadways in the go...

Claims

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Application Information

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IPC IPC(8): E21D20/00
Inventor 李学华侯朝炯丁效雷姚强岭杨宏敏
Owner CHINA UNIV OF MINING & TECH
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