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Method for filling solid and fully mechanizing and recovering room type coal pillar

A room-type coal pillar and solid filling technology, which is applied in the fields of filling, ground mining, mining equipment, etc., can solve the problems of hard roof, low degree of mechanization, and low production efficiency, and achieve high production efficiency and improve recovery rate. , the effect of low cost

Active Publication Date: 2010-06-09
CHINA UNIV OF MINING & TECH
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Problems solved by technology

The above methods have relatively low degree of mechanization, low production efficiency, small scale, and a series of safety issues such as hard roof, spontaneous combustion of residual coal, and mine water disasters need to be dealt with during the mining process.

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  • Method for filling solid and fully mechanizing and recovering room type coal pillar
  • Method for filling solid and fully mechanizing and recovering room type coal pillar

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Embodiment Construction

[0015] Take the No. 2 well of a mine in Inner Mongolia Yitai Coal Co., Ltd. as an example. The mine is located in the Boniuchuan census area of ​​Dongsheng Coalfield, Inner Mongolia Autonomous Region. The coal seam in the design recovery mining area belongs to a single inclined coal seam , the inclination angle is 1-3°, the average buried depth is 170m, the average thickness is 6.34m, the size of the mining coal room is 8×8×4.5m, and the size of the reserved coal pillar is 8×8×4.5m. According to the conventional design, the length of the filling mining face is 150m, the advancing length is 670m, and the mining height is 6.0m. The method of solid filling fully mechanized recovery of room-type coal pillars is as follows:

[0016] (1) First, the roof of the coal pillar 1 and the coal room 2 in the recovery area of ​​the room-type coal pillar is strengthened and supported by the anchor net cable support method;

[0017] (2) Arrange the solid object transportation entryway 3 and t...

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Abstract

The invention discloses a method for filling solid and recovering and fully mechanizing room type coal pillars, comprising the following steps of: reinforcing and supporting a coal pillar and a coal room top plate in a pre-recovering room type coal pillar area and suspending and hanging a wind curtain to form a solid substance haulage drift and a coal haulage drift which are connected with a large haulage drift; recovering the coal pillars by the conventional method, starting matching equipment after cutting a coal interval and transporting the solid substances to a goaf from the ground for filing and tamping; and cutting coal of next coal interval and filling the goaf, repeating the steps until finishing the recovery of all room type coal pillars. The method not only solves the problems that unstable coal pillar causes the safety accidents due to the superposition of stress of the front part and two sides of a workface because of the recovery of the traditional coal pillar, but also eliminates the potential safety trouble caused by the hurricane, large-area sinking and the like caused by the spontaneous combustion of the room type coal pillar and the large-area caving of hard top plates in the goaf. The invention has simple method, high production efficiency, low cost and over 85 percent of the recovery rate of the coal pillars.

Description

technical field [0001] The invention relates to a method for recovering a room-type coal pillar in a coal mine, in particular to a method for recovering a room-type coal pillar using a solid filling fully mechanized mining technology, which is safe, efficient and high in recovery rate. Background technique [0002] In the western mining areas of my country, the underground coal mining adopts room-type technology, which has a low coal recovery rate of only about 30%, resulting in a large amount of coal being left underground in the form of residual coal pillars. According to statistics, about 6.6 to 7 billion tons of coal resources in my country are left underground, forming sluggish coal. Sluggish coal is prone to spontaneous combustion during the long-term oxidation process underground, causing environmental pollution and a serious waste of coal resources in our country. With the development of the national economy, the demand for coal resources is increasing day by day, h...

Claims

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Application Information

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IPC IPC(8): E21C41/16E21F15/06
Inventor 张吉雄缪协兴巨峰黄艳利吴强
Owner CHINA UNIV OF MINING & TECH
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