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煤巷快速成巷技术现状及应用效果评价方法研究

Research on current situation of rapid driving technology in coalroadway and its assessment method of application effect

  • 摘要: 当前我国煤巷整体成巷速度慢,造成采掘失调。针对煤巷快速成巷,国内外在掘进装备、临时支护、永久支护等方面研发了多种形式的掘支装备。现有煤巷掘支装备主要包括:悬臂式掘进机、连采机、掘锚机及全断面掘进机;临时支护主要包括:自移式支架、掘进机液压顶棚、护盾式临时支护机构等,永久支护包括:钻锚一体化锚杆、掘锚一体机、锚杆钻车及其他集成化液压锚杆支护装备。现场实践发现,现有技术中掘进装备较为成熟,能够基本满足煤巷截割破岩的需求,但临时支护强度不足、不能顶帮全覆盖及时支护,难以满足我国大多数煤巷临时支护的要求。永久支护工艺复杂,提速效果有限。整体上看,现有装备尚难满足我国一般及复杂地质条件下煤巷快速成巷的需求,且在短期内难以实现较大突破。实现我国煤巷快速成巷除了需要针对我国煤矿具体的条件开展针对性研发外,还应建立针对我国各类围岩条件的快速成巷技术评价方法,最大程度利用现有装备提升煤巷成巷速度。影响煤巷快速掘进的主要因素包括:围岩地质力学条件、工程条件、掘进与支护装备条件等。快掘系统的效果评价应在确定影响巷道快速成巷主要因素的基础上,分析各因素对巷道掘进的影响程度并按影响程度排序,进而对比确定适用于相应条件的巷道快速成巷装备,为快速成巷装备的选型提供依据。

     

    Abstract: Due to the low speed of coal roadway driving in China, it induced a large imbalance of the mining and driving speed in coal mine. Many manufacturers put a lot of efforts in research and development of driving equipment, temporary support and permanent support to improve the driving speed. The existing driving equipment in coal mining includes boom-type roadheader, continuous miner, continuous miner bolter and full-face driving equipment. Temporary support mainly includes self-advancing support, roadheader with temporary support and shield type temporary support. The permanent support mateives and equipment includes self drilling bolt, continuous miner bolter, hydraulic rockbolter and other hydraulic rockbolter equipment. Field practice show that the driving equipment can finish the coal and rock cutting task soon and meet the driving speed requirements. But the low support strength of temporary support can not meet support strength requirements in majority coal mine in China and the permanent support has complex installation processes. Overall, the existing rapid driving and support equipments have not generally improve driving speed of coal roadway in China and is difficult to break through in a short. In order to improve the overall driving speed, it is necessary put great efforts to develop new materials and equipment. More immediately, it is necessary to analyze the main factors that affect driving speed of coal roadway, and then establish the existing rapid driving equipment selection method. This paper summarizes the main factors that affect driving speed of coal roadway, including the surrounding rock conditions, engineering conditions, driving and supporting equipment conditions. According to various factors that affect a specific roadway, the influence degree of each factor on driving speed should be obtained. Then the equipment selection of rapid driving equipment under corresponding conditions can be determined. The evaluation method of rapid driving can provide the basis for determining the main factors affecting rapid driving and the selection of suitable equipment.

     

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