Centralized filling roadway layering stepping mining and filling "three under" mining method for approximately horizontal superhigh seam
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A technology for extra-thick coal seam and thick coal seam is applied in the field of three-stage coal mining, which can solve the problems of difficult filling in top coal caving mining, unsuitable for three-stage mining, low mining efficiency, etc., so as to improve mining efficiency and economic benefits, and save mining. cost, the effect of improving the recovery rate
Active Publication Date: 2019-08-20
山东威斯特矿山工程科技股份有限公司
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[0003] In the mining of advanced horizontal coal seams, there are mainly three main mining techniques for extra-thick coal seams: one-time full-height mining with large mining height, top-coal caving mining, and layered mining, but one-time full-height mining has high requirements on geological conditions and is not suitable for three-down Mining; top-coal mining and filling are difficult, and the recovery efficiency is low; in addition, using the existing mining method for filling in layered mining will lead to low mining efficiency, and the roadway layout of the filling system makes mining connection difficult
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Embodiment 1
[0031] The three-down coal mining method is the three-step coal mining method of the concentrated filling roadway in the near-horizontal extra-thick coal seam, such as Figure 1 to Figure 6 As shown, the thick coal seam is divided into multiple mining layers, and the specific steps include:
[0032] Step A. Arrange concentrated filling lanes 1 along the coal seam roof, arrange transport troughs 2 along the coal seam floor, and cut holes 3 at the boundary of the working face at an inclination angle of 5-7°. Specifically, the incision 3 is made from the transport trough 2, and the length of the incision 3 is specifically determined according to the filling capacity of the roadway filling equipment.
[0033] Step B. Connect with the concentrated filling lane 1 by setting up the concentrated filling inclined lane 4 and the filling chamber 5, wherein the inclination angle of the filling inclined lane 4 is 50-60°, and the self-slipping of the filling material can be realized by usin...
Embodiment 2
[0040]In order to further illustrate the beneficial effects of this coal mining method, a mine example is used to further illustrate this method. A certain mine has a near-horizontal coal seam with a thickness of 24 meters. / year, industrial squares and government development zones press 50 million tons of coal. After adopting this method, the problem of coal gangue emission is effectively solved, and 1.8 million tons of coal are recovered at the same time, which has both social and economic benefits.
[0041] Specifically, the mining process of the mine is to divide the 24-meter-thick coal seam into five mining layers, which are C1, C2, C3, C4 and C5 from bottom to top, and the thickness of each mining layer is less than 5 meters; After demarcating the boundary of the working face, the mining steps specifically include:
[0042] Step A. Arrange centralized filling lanes along the coal seam roof, arrange transportation troughs along the coal seam floor, cut holes from the tran...
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Abstract
The invention provides a centralized filling roadway layering stepping mining and filling "three under" mining method for an approximately horizontal superhigh seam, and relates to the mining method technology field. The approximately horizontal superhigh seam is first divided into multiple mining layers, and the centralized filling roadway layering stepping mining and filling "three under" miningmethod for the approximately horizontal superhigh seam specially includes steps: A, arranging a centralized filling roadway along a coal seam roof, arranging a transport gate road along a coal seam floor, and opening a cutting hole at a dip angle of 5-7 degrees on a boundary of a working face; B, by arranging a centralized filling inclined roadway, a filling chamber and the centralized filling roadway in communicating mode, forming a transport gate road-cutting hole-centralized filling inclined roadway-filling chamber-centralized filling roadway air return system; C, alternately arranging a plurality of branch roadways Z and a plurality of coal pillars M at the lowest mining layer along the cutting hole, completing mining of the branch roadways Z first, and filling the branch roadways Z;D, mining the coal pillars M after completing filling of the roadways Z, and filling the coal pillar areas, a transport roadway and the transport gate road; E, repeating the steps from A to D, and completing mining of all the mining layers. The centralized filling roadway layering stepping mining and filling "three under" mining method for the approximately horizontal superhigh seam achieves filling and mining of the approximately horizontal superhigh seam, and is safe and efficient.
Description
technical field [0001] The invention relates to the technical field of coal mining methods, in particular to a three-down coal mining method for centralized filling roadway layered and step-by-step mining in a near-horizontal extra-thick coal seam wall system. Background technique [0002] Three-down mining refers to the mining of ore deposits located under surface water bodies, buildings and railways (roads). The deformation of ground buildings and railway (highway) main lines is controlled within the allowable range, and at the same time, it is prevented from flooding caused by surface water pouring into the well. The filling mining method refers to the mining method of filling the goaf with filling materials while accompanying ore falling, transportation and other operations. Standing on the bottom plate. [0003] In the mining of advanced horizontal coal seams, there are mainly three main mining techniques for extra-thick coal seams: one-time full-height mining with la...
Claims
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