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本文通过对巷道维护,煤柱损失,采区生产能力,运输和巷道掘进等技术经济因素的分析,研究了倾斜分层下行垮落采煤法的区段集中平巷的合理布置.由于各方案的区段平巷与回采空间相互位置关系的不同,使回采所引起的矿山压力显现对巷道维护的影响显著不同.文章根据在各矿的观测资料,阐述了各方案的区段集中平巷受采动影响后的维护特征,分析了它们在维护上的差别,并计算了各方案的吨煤巷道维修费用.按照改善巷道维护和降低煤柱损失等观点,提出了确定各方案区段煤柱的形状和尺寸的若干原则,并计算了区段煤柱损失率和分析了煤柱损失的经济价值.此外,还根据煤炭运输、巷道掘进等计算了各方案区段内的吨煤总费用.通过各方案的技术经济分析后认为,在厚煤层内用煤柱维护区段集中平巷的巷道布置,因巷道维护极其困难,煤柱损失很大,不宜采用.区段内无集中平巷、各分层依次采掘的方案,虽存在不少缺陷,但它的区段平巷较易维护,并可显著地降低区段煤柱损失,因此在目前还不具备开掘岩石区段集中平巷的条件下,仍可采用.煤层分层数三个以上时,将区段集中平巷布置在较稳定的底板岩层里,在技术经济上一般均优于上述区段平巷沿厚煤层布置的方案.缓倾斜厚煤层(三个分层)与邻近薄或中厚煤层的间距不超过20～30米时,将区段集中平巷布置在下部较稳定的邻近煤层内也是有利的.
Based on the analysis of technical and economic factors such as roadway maintenance, coal pillar loss, production capacity of mining area, transportation and roadway driving, this paper studies the rational arrangement of sectionally centralized roadway with inclined stratified downward caving mining method.Because each program The difference of the mutual positional relationship between the section laneway and the recovery space makes the mine pressure caused by the mining show a significant difference in the maintenance of the roadway.This paper elaborates the method of mine section concentration by roadway And analyzed the difference in their maintenance, and calculated the maintenance cost of each project of tons of coal roadway.According to improving the roadway maintenance and reducing the loss of pillars, put forward to determine the pillars of the various sections of the program Shape and size, and calculates the economic value of the loss rate of coal pillars in section and analyzes the loss of coal pillars.In addition, the total cost of coal per ton of coal in each scheme section is also calculated according to coal transportation, tunneling, etc. By According to the technical and economic analysis of each program, it is considered that it is very difficult to maintain the roadway with a centralized laneway in the thick coal seam with coal pillars because of the extremely difficult maintenance of the roadway and large loss of coal pillars. There are no centralized lanes in the project. However, there are many shortcomings in the stratified excavation programs. However, the section lanes are relatively easy to maintain and can significantly reduce the loss of coal pillars in the section. Therefore, there is no plan to excavate the rock areas Section of the roadway conditions can still be used.When the number of layers of coal seam more than three, the section concentrated laneway layout in a more stable floor rock strata, in the technical and economic are generally better than the above section along the laneway thickness Proposal for Coal Seam Placement When the distance between the gently inclined thick coal seam (three strata) and the adjacent thin or medium thick coal seam is no more than 20 to 30 meters, it is also advantageous to arrange the sectionally concentrated aisle in the lower stable coal seam .