A method of withdrawal and final mining in fully mechanized mining face

A fully-mechanized mining face and working face technology, which is applied in ground mining, mining equipment, earthwork drilling and mining, etc., can solve the problem of difficult determination of cracks in roof strata and mechanical properties of the retracted roadway, complex stress changes of surrounding rock, and surrounding rock problems. Large amount of rock deformation and other problems can be avoided, so as to avoid support rework, realize the deformation ability of surrounding rock, and reduce the effect of impact
CN111022048BActive Publication Date: 2021-06-04XIAN UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
XIAN UNIV OF SCI & TECH
Publication Date
2021-06-04

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Abstract

The invention discloses a retraction end-mining method of a fully mechanized mining face, which comprises the following steps: installing a bracket in the retraction channel; adjusting the bottom plate of the working face to be 180 mm to 220 mm higher than the bottom plate of the retraction channel; determining the anchor rod and anchor cable of the retraction channel support, and then use anchor rods and anchor cables to support the withdrawal channel; carry out coal mining at the end of mining; stop mining and withdraw fully-mechanized mining equipment. The method of the present invention is based on the support determination method of roof bolts, roof anchor cables and side bolts to carry out final mining. On the basis of completing the support design at one time, support rework can be avoided, and final mining can be ensured to proceed smoothly.
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Description

technical field

[0001] The invention belongs to the technical field of mine mining, and in particular relates to a retraction and final mining method of a fully mechanized mining face. Background technique

[0002] The retreat of the fully mechanized mining face directly affects the production efficiency of coal mines. Safety, efficiency and economy are three important indicators. The stability of the surrounding rock of the withdrawal channel is the premise to ensure the safety and rapid withdrawal of the equipment, which is directly related to the production efficiency and economic benefits of the coal mine. Coal mining enterprises and industry experts attach great importance to such issues. Under the influence of excavation and mining, the nature of the surrounding rock of the retracted roadway will change. Therefore, when designing the support of the retracted roadway, the structure of the coal seam roof and its movement law in the mining area should be fully considered,...

Claims

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