大采高工作面回风巷道支护参数优化研究

doi:10.16265/j.cnki.issn1003-3033.2022.S2.0098

摘要/Abstract

摘要：

为减少大采高回采巷道支护成本,提高掘进效率,以补连塔煤矿12511大采高工作面回风巷道为对象,通过对比不同支护方案巷道围岩的稳定性,研究巷道支护参数的可优化性。针对现有支护方案,开展理论分析、现场实测进行巷道围岩稳定性分析;针对参数优化后支护方案,采用数值模拟分析巷道围岩的稳定性。结果表明:现有支护条件满足安全生产要求,采动影响下巷道围岩未发生明显破坏,支护强度偏大;通过改变锚杆、锚索的直径、数量和排距,优化支护参数;优化后方案相较于现有支护方案,正帮、副帮和顶板的变形量仅分别增加10%、6%和16%,满足巷道支护要求;方案优化后支护成本降低47.3%,提高巷道掘进效率,改善矿井接续紧张局面。

关键词: 大采高工作面, 回风巷道, 支护参数, 锚杆, 围岩, 数值模拟

Abstract:

In order to reduce the support cost and improve the tunneling efficiency of mining roadways with large mining height, a return air roadway was taken as the object. The roadway was from 12511 working face with large mining height in Bulianta coal mine. The optimization of support parameters of the roadway was studied by comparing the stability of surrounding rock of the roadway under different support schemes. In view of the existing support scheme, theoretical analysis and field measurement were carried out, so as to analyze the stability of the surrounding rock. For the support scheme after parameter optimization, the stability of the surrounding rock was analyzed by numerical simulation. The results show that the existing support conditions have met the requirements of safe production. The surrounding rock of the roadway under the influence of mining is not greatly damaged, and the support strength is too large. By changing the diameter, quantity, and row spacing of anchor bolts and cables, the support parameters are optimized. Compared with the existing support scheme, the optimized scheme increases the deformation of the main side, auxiliary side, and roof by 10%, 6%, and 16%, respectively. The values have met the requirements of roadway support. In addition, the scheme reduces the support cost by 47.3%, increases the tunneling efficiency of the roadway, and alleviates the tension in the mine connection.

Key words: mining roadways with large mining height, return air roadway, support parameters, anchor bolt, surrounding rock, numerical simulation

范东林, 王巍. 大采高工作面回风巷道支护参数优化研究[J]. 中国安全科学学报, 2022, 32(S2): 166-171.

FAN Donglin, WANG Wei. Study on support parameter optimization of mining roadway in working face with large mining height[J]. China Safety Science Journal, 2022, 32(S2): 166-171.

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支护方案	锚杆成本/(元·m^-1)	锚索成本/(元·m^-1)	总成本/(元·m^-1)	巷道长/m	成本降低/%
原支护	426	1 567.94	1 993.94	3 250	—
优化支护	402.5	647.5	1 050	3 250	47.3