Speedy drivage process for thin bottom plate roadway of hard coal bed
A thin floor and coal seam technology, which is applied in cutting machinery, discharge machinery, earthwork drilling and mining, etc., can solve the difficulty of adapting to the requirements of thin coal seam mining, the difficulty of cutting the floor with low-power fully mechanized excavators, and the difficulty of cutting the floor with high-power fully mechanized excavators. Problems such as large equipment size have achieved the effect of improving the level of safety assurance, increasing the support height and working space, and ensuring continuous, safe and reliable transportation
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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-dig-type rock loader loading coal gangue-dig-type rock loader retreat-permanent support protect.
[0039] (3) ZQS-50 / 1.6 type 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 type pneumatic drill, equipped with hexagonal drill pipe, Φ32mm flat or column tooth type drill bit; Φ16mm and Φ10mm high-pressure rubb...
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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