CN-122014282-A - Large mining height working face temporary working space enclosing system and enclosing method

CN122014282ACN 122014282 ACN122014282 ACN 122014282ACN-122014282-A

Abstract

The invention discloses a working space enclosing system for facing a large mining height, which comprises a gangue blocking support, a die hanging support and a plurality of end supports, wherein the end supports are arranged in a row in a lane-retaining end area and are positioned on one side of a working surface, the gangue blocking support is arranged behind a third end support and a fourth end support, and the die hanging support is positioned behind a second end support. The temporary working space enclosing system for the large mining height working surface ensures that surrounding rock of the working space is stable during the roadway retaining process, and ensures the safety of constructors of the working space.

Inventors

ZHANG HAIQING
FENG ZHIBO
ZHENG HAORAN
NING TAO
YANG ZHONGYU
CHANG XIAOFEI

Assignees

国能包头能源有限责任公司
国能包头能源有限责任公司万利一矿
陕西开拓新矿业工程有限公司

Dates

Publication Date: 20260512
Application Date: 20260410

Claims (10)

1. The temporary working space enclosing system for the large mining height working face is characterized by comprising a gangue blocking support, a die hanging support and a plurality of end supports, wherein the end supports are arranged in a row in a lane-retaining end area and are positioned on one side of the working face, the gangue blocking support is arranged behind a third end support and a fourth end support, and the die hanging support is positioned behind a second end support.
2. The high head face space envelope system of claim 1, wherein a plurality of said head end brackets are meshed in front of the frame.
3. The large mining height face time working space enclosing system according to claim 2, wherein anchor rods and anchor cables are arranged in front of the end support frame.
4. A temporary working space enclosing method for a large mining height working surface is characterized in that gangue blocking supports, a die hanging support and a plurality of end supports are arranged in a lane retaining end area, the plurality of end supports are arranged in a lane retaining end area in a row and located on one side of the working surface, the gangue blocking supports are arranged behind a second end support and a third end support, the die hanging support is located behind the second end support, an anchor rod or an anchor cable is paved and arranged above the plurality of end supports along with each stoping of the working surface, then the plurality of end supports move forwards by one step distance, the gangue blocking support and the die hanging support correspondingly move by one step distance, and a flexible template is cast through a template after the die hanging support moves by one step distance.
5. The method for enclosing the temporary working space of the large mining height working surface according to claim 4, which is characterized by comprising the following steps: Step 1, when working face equipment of a retaining roadway is arranged, arranging an end support in an end area of the retaining roadway, arranging gangue blocking supports behind a third end support and a fourth end head frame, and arranging a die hanging device behind a second end support; Step2, after a cutter is extracted by the working face, paving a flexible net in front of the frame in the tail direction before the second one of the plurality of end supports starts, so as to meet the gangue blocking support gangue pocket requirement; setting up anchor rods or anchor cables between every two adjacent end brackets by vertically arranging the top plate between every two adjacent end brackets, and repairing the anchor rods or anchor cables which are not or less arranged between the end brackets after the brackets; Step 3, along with each forward movement of the end support by one step distance, the gangue blocking support and the die hanging device immediately move forward by one step distance along with the end support; Step 4, after the working face is pushed and picked, the die hanging device moves forward to reach the space for hanging two flexible dies, and then hanging the flexible dies to be poured; Step 5, when the strength of the soft mold concrete meets the requirement, demolding the mold hanging device, continuing to push and advance along with the working surface, and advancing the temporary working space; And 6, repeating the steps 1-5 until the gob-side entry retaining tunnel retaining work is completed.
6. The temporary working space enclosing method for large mining height working surfaces according to claim 5, wherein in the step 2, the width of the net is 8 m-12 m before the end bracket frame, and the net is continuous along the working surface pushing and mining direction.
7. The method for enclosing the temporary working space of the large mining height working surface according to claim 6, wherein in the step 2, the distance between anchor rods or anchor ropes which are arranged between the end bracket frames is 700 mm-900 mm.
8. The method for enclosing temporary working space of large mining height working face according to claim 7, wherein in the step 2, the row spacing of anchor rods or anchor cables arranged between the end bracket frames is 1700 mm-1800 mm.
9. The method for enclosing the temporary working space of the large mining height working surface according to claim 8, wherein in the step 1, the empty roof length of the top plate between the top beam and the end bracket of the die hanging device is not more than 2m.
10. The method for enclosing the temporary working space of the large mining height working surface according to claim 9, wherein in the step 4, the die hanging device hangs at most two flexible dies at a time.

Description

Large mining height working face temporary working space enclosing system and enclosing method Technical Field The invention belongs to the technical field of gob-side entry retaining support of coal mines, and particularly relates to a temporary working space enclosing system for large mining height work faces and a temporary working space enclosing method for the large mining height work faces. Background Coal occupies a large specific gravity in energy constitution. Coal has been more than five in the energy consumption structure in the past 2021. In the future, the energy conservation and emission reduction policies are continuously implemented. Coal consumption has steadily increased for 2016 and 2022 is expected to exceed 43 billion tons, and it is expected that coal will remain dominant in the energy consumption structure until 2030. In addition, with the continuous acceleration of economic development, the demand for coal resources is increased, so that the contradiction between the demand for coal and the reserve of coal resources is increasingly prominent. And most mining areas still adopt a method of reserving wide coal pillars to resist stress disturbance and maintain roadway stability, which also aggravates the waste of a large amount of high-quality coal resources. Therefore, how to realize stable control of roadway surrounding rock on the premise of green, efficient and safe exploitation of coal resources becomes a new challenge facing the coal industry at present. The problem is effectively solved by the proposal of the gob-side entry retaining coal pillar-free mining technology, and the mining mode and the technology are well matched with the current long-distance strategic targets. By constructing the roadside filling body along the goaf edge to implement gob-side entry retaining, the problem of mining and taking over tension is relieved, the multiplexing roadway is in a low-stress environment, and the stability of surrounding rock of the roadway is ensured to a certain extent. Aiming at the gob-side entry retaining application of a large mining height working face, how to ensure the stability of surrounding rock in a temporary working space is a key for ensuring the smooth progress of gob-side entry retaining of the large mining height working face due to the high working face and the complex stress. Disclosure of Invention The invention aims to provide a temporary working space enclosing system for a large mining height working surface, which ensures the stability of surrounding rock of a working space during a roadway retaining period and ensures the safety of constructors of the working space. In order to achieve the purpose, the technical scheme includes that the temporary working space enclosing system of the large mining height working face comprises a gangue blocking support, a die hanging support and a plurality of end supports, wherein the end supports are arranged in a lane-retaining end area in a row and are located on one side of the working face, the gangue blocking support is arranged behind a third end support and a fourth end support, and the die hanging support is located behind a second end support. The technical scheme of the invention also has the following characteristics: The net is laid in front of the frames of the plurality of end brackets. And an anchor rod and an anchor cable are arranged in front of the end bracket. The method comprises the steps of arranging gangue blocking brackets, die hanging brackets and a plurality of end brackets in a roadway retaining end region, arranging the plurality of end brackets in a row in the roadway retaining end region and located on one side of a working face, arranging the gangue blocking brackets behind a second end bracket and a third end bracket, arranging the die hanging brackets behind the second end bracket, paving a net above the plurality of end brackets and arranging anchor rods or anchor cables along with one cutter of the working face, moving the plurality of end brackets forwards by one step distance, correspondingly moving the gangue blocking brackets and the die hanging brackets by one step distance, and pouring a molded flexible template through the template after the die hanging brackets move by one step distance. The second object of the invention is to provide a temporary working space enclosing method for a large mining height working surface, which ensures the stability of surrounding rock of the working space during the entry retaining and ensures the safety of constructors of the working space. The technical scheme includes that the temporary working space enclosing method for the large mining height working surface comprises the steps of arranging gangue blocking supports, die hanging supports and a plurality of end supports in a lane-retaining end area, arranging the plurality of end supports in a lane-retaining end area in a row and located on one side of the working surface, arranging the gangue bl