Rapid Excavation Technology of Thin Floor Roadway in Hard Coal Seam

A technology of thin bottom plate and coal seam, which is applied in cutting machinery, slitting machinery, discharging machinery, etc., can solve the problem of large size of high-power fully mechanized excavator equipment, difficult to exert fully mechanized excavation efficiency, and low-power fully mechanized excavator cutting bottom plate. difficulties, etc.

Active Publication Date: 2021-05-18
SHANDONG DONGSHAN XINYI COAL MINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult for low-power fully-mechanized excavators to cut the floor, and it is difficult to exert the efficiency of fully-mechanized excavation; the equipment size of high-power fully-mechanized excavators is relatively large, which requires a large tunnel section, which is difficult to meet the requirements of thin coal seam mining

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The rapid excavation process of thin-floor roadway in hard coal seam includes the following processes: coal seam drilling → gas inspection, watering and dust reduction → blasting → gas inspection, dust removal, watering and dust reduction → temporary support → tunneling → transportation → permanent support.

[0030] The coal seam drilling uses a ZQS-50 / 1.6 type air coal drill with a Φ28mm twist drill pipe and a Φ32mm drill bit; rock drilling uses a YT-28 type pneumatic drill with a hexagonal drill pipe and a Φ32mm straight or column-toothed drill bit; The water pipes adopt Φ16mm and Φ10mm high-pressure rubber hoses respectively, and the pressure resistance level of the high-pressure rubber hoses is not less than 10Mpa.

[0031] In the blasting process, the cutting method adopts wedge-shaped cutting, the cutting hole adopts collimation hole, the angle between the blast hole and the working face is 81°, and the cutting hole is arranged in the coal seam; the peripheral hole...

Embodiment 2

[0036] The rapid excavation process of roadway with thin floor in hard coal seam includes the following processes:

[0037] (1) The labor organization adopts the "38" system for production. Each shift is equipped with 1 squad leader, 5 drilling and support workers, 1 conveyor driver, 1 digging rock loader driver, 1 blasting worker, and 1 electromechanical maintenance worker, totaling 10 people.

[0038] (2) Technological process: shift shift-drilling-gas inspection, watering and dust reduction-blasting-gas inspection, dust removal, watering and dust reduction-temporary support-excavation rock loader loading coal gangue-excavation rock loader retreat-permanent support protect.

[0039] (3) ZQS-50 / 1.6 pneumatic coal drill is used for coal seam drilling, equipped with Φ28mm twist drill pipe and Φ32mm drill bit; rock drilling is used with YT-28 pneumatic drill, equipped with hexagonal drill pipe, Φ32mm flat or column tooth drill bit; Φ16mm and Φ10mm high-pressure rubber hoses ar...

Embodiment 3

[0045] In order to improve the defects of the existing technical process, the roadway differentiation is promoted, and the backhoe loader and supporting transportation facilities are used to realize the integrated and continuous transportation of coal gangue. Optimize the construction process to ensure the completion of regular cycle operations. The head-on construction work must be based on the staffing of the labor organization, and the procedures should be arranged reasonably. The procedures and procedures should be crossed and paralleled as much as possible to make full use of working hours and improve the utilization rate of working hours. . A new type of temporary support is adopted to ensure that the operating personnel do not enter the empty roof area and ensure the construction safety of the operators.

[0046] 1. Optimization of roadway section: On the basis of meeting the basic needs of the roadway, the height of the roadway should be reduced as much as possible, th...

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Abstract

The invention belongs to the technical field of coal mining, and specifically relates to a rapid excavation process of a roadway with a thin floor in a hard coal seam, including the following processes: coal seam drilling → gas inspection, water sprinkling and dust reduction → blasting → gas inspection, dust discharge, water sprinkling and dust reduction → temporary support → tunneling → transportation → Permanent support. The invention adopts excavating loaders and supporting transportation facilities to realize the integrated and continuous transportation of coal and gangue, promotes roadway differentiation, and adopts new temporary supports to ensure that operating personnel do not enter the empty roof area and ensure the construction safety of operators. This method is safe , High efficiency, shorten the construction period.

Description

technical field [0001] The invention belongs to the technical field of coal mine mining, and in particular relates to a rapid excavation process of a roadway with a thin floor in a hard coal seam. Background technique [0002] The current excavation construction of thin coal seam roadway still uses conventional rock drilling and blasting, and the material transportation in the back road is mainly transported by dispatching winches. The monthly excavation footage is about 150m, which is low in efficiency and labor-intensive. It is difficult for low-power fully-mechanized excavators to cut the floor, and it is difficult to maximize the efficiency of fully-mechanized excavation; high-power fully-mechanized excavators are large in size, requiring a large section of tunneling roadway, which is difficult to meet the requirements of thin coal seam mining. Contents of the invention [0003] In order to solve the technical problems existing in the above-mentioned prior art, the pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C25/68E21C35/20E21C37/00E21F13/00
CPCE21C25/68E21C35/20E21C37/00E21F13/00
Inventor 石刚陈超杰王树方杨永永宋明东张卫徐国华张明明解学兵花博韩雪
Owner SHANDONG DONGSHAN XINYI COAL MINE CO LTD
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