回采巷道锚杆支护效果模糊综合评判

Fuzzy Comprehensive Evaluation of Bolt Support Effects in Deep-Mining Gateway

锚杆支护已成为深井巷道围岩控制的主要形式,支护效果的好坏除与所采用的支护方式有关外,还与围岩性质、开采条件有关.为准确评判回采巷道锚杆支护效果,以平顶山矿区深部回采巷道为研究对象,选取32条回采巷道为样本,依据围岩强度、支护强度、巷道埋深、围岩完整性、采动影响、巷道断面、煤柱宽度等7个指标,采用模糊聚类分析的方法将巷道围岩支护效果分成好、较好、一般、差4类.据此对新掘巷道给定条件下的支护效果进行预判,为锚杆支护参数确定提供依据.

Bolt support has become the main form of surrounding rock control in deep-mining gateway. Good or bad supporting effect, is related not only to the support patterns, but also to the surrounding rock properties and mining conditions. To evaluate the bolt support effect in gateway accurately, taking the gateways in Pingdingshan Mining Area as the research object, 32 deep-mining gateways are selected as samples to study in this paper. Based on seven indexes such as surrounding rock strength, support strength, gateway depth, surrounding rock integrity, mining influence, gateway section and coal pillar width, etc, the bolt support effects in gateway can be divided into four kinds including better, good, common and poor by the fuzzy clustering analysis. Based on the above method, the bolt support effect in new driving gateway is pre-evaluated under given conditions, which provides the basis for bolting parameters, determination.