Study on scientific productivity determination and scientific productivity improvement of rock burst mine
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摘要:
我国埋深
1000 m以上的煤炭资源储量占总储量的50%以上，未来将是煤炭资源供应的主要部分，开展冲击地压矿井科学产能确定研究并科学提升冲击地压矿井产能，对于保障我国深部煤炭资源的安全高效开采有重要意义。针对冲击地压矿井产能确定与产能提升问题，利用理论分析、现场监测等研究方法，完成了含有冲击地压煤层的矿井井田范围科学划分，分析了冲击地压矿井不同的采煤方法、开采顺序、开采布局下采煤面扰动响应特征，建立了冲击地压矿井科学产能的确定方法，提出了冲击地压矿井产能科学提升的顶层设计与实践方法。研究结果表明：明确了冲击地压矿井冲击倾向性鉴定与冲击危险性确定的必要性，实现含有冲击地压煤层的矿井井田范围科学规划；研究了采煤方法、开采顺序与布局以及开采参数对采煤面扰动响应特征，得出了冲击地压矿井采煤面科学设计的系统性方法，为冲击地压矿井产能提升创造条件；提出了冲击地压矿井产能确定的技术路径，基于采动力学构建了“分阶段、分区域、分时期、看卸压力度、看历史防控水平”的冲击地压矿井采煤面推进速度确定方法；构建了冲击地压矿井产能提升的顶层设计，明确指出了控制产能的关键是产能提升所带来的冲击危险性，实现采动强度与卸压力度平衡，降低冲击危险性，从而有效的进行产能提升。构建了冲击地压矿井从井田范围科学规划、采煤面科学设计到产能科学确定及科学提升产能的一体化技术路径，为冲击地压矿井科学产能确定及科学提升产能提供了科学指导。Abstract:China's coal resources with a buried depth of more than
1000 m account for more than 50% of the total reserves, which will be the main part of coal resources supply in the future. It is of great significance to carry out the scientific productivity of rock burst mines and scientifically improve the productivity to ensure the safe and efficient mining of deep coal resources in China. Aiming at the problem of productivity determination and productivity improvement of rock burst mine, the range of mine field containing rock burst coal seam is scientifically divided by theoretical analysis and field monitoring, and the disturbance response characteristics of mining face under different mining methods, mining sequences and mining layouts in rock burst mine are analyzed, the determination method of scientific productivity of rock burst mine is established, and the top-level design and practice method of scientific productivity improvement of rock burst mine are put forward. The research results show that it is necessary to identify the impact tendency and determine the impact risk of the rock burst mine, and to realize the scientific planning of the mine field range with rock burst coal seam; The mining method, mining sequence and layout, and the response characteristics of mining parameters to the disturbance of coal face are studied, and the systematic method of scientific design of coal face in rock burst mine is obtained, which creates conditions for the productivity improvement of rock burst mine. This paper puts forward the technical path to determine the productivity of rock burst mine, and based on mining dynamics, constructs a method to determine the advancing speed of coal face in rock burst mine by stages, regions, periods, unloading pressure and historical prevention and control level. The top-level design of productivity improvement in rock burst mine is constructed, and it is clearly pointed out that the key to control productivity is the impact risk brought by productivity improvement, so as to achieve the balance between mining intensity and unloading pressure and reduce the impact risk, thus effectively improving productivity. The integrated technical path from scientific planning of mine field scope and scientific design of coal face to scientific determination and improvement of productivity in rock burst mine is constructed, which provides scientific guidance for scientific determination and improvement of productivity in rock burst mine. -
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图 1 井田范围内冲击危险区域的3D可视化展示
Figure 1. 3D Visualization of rock burst danger area in mine field
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图 2 基于冲击危险区域的井田范围划分
Figure 2. Division of minefield boundaries based on rock burst hazard zones
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图 3 保护层开采能量释放及应力分布
Figure 3. Energy release and stress distribution in protective layer mining
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图 4 基于三分两看的冲击地压矿井产能确定
Figure 4. Determination of productivity of rock burst mine based on three points and two views
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图 5 基于加载响应比的工作面推进速度确定
Figure 5. Determination of working face advancing speed based on loading response ratio
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图 6 不同推进速度下应力路径演化示意
Figure 6. Schematic diagram of stress path evolution at different propulsion speeds
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图 7 基于冲击地压多元监测指标与卸压效果评估的掘进速度分阶段确定实施流程
Figure 7. Phase-based implementation process for determining excavation speed based on multi-parameter monitoring indicators and pressure relief effect evaluation of rock burst
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图 8 不同掘进速度下地音能量变化特征
Figure 8. Characteristic diagram of ground acoustic energy variation under different excavation speeds
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图 9 掘进速度与地音最大能量多项式拟合图
Figure 9. Polynomial fitting diagram of driving speed and maximum energy of ground sound
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图 10 基于开采扰动响应约束的采煤面推进速度确定
Figure 10. Determination of coal face advancing speed based on mining disturbance response constraint
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图 11 不同推进速度顶板岩层垮落破断、能量释放特征
Figure 11. Characteristics of roof strata caving, breaking and energy release at different advancing speeds
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图 12 采动强度与卸压力度耦合调控采煤面推进速度
Figure 12. Coupling of mining intensity and unloading pressure to control the advancing speed of coal face
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图 13 冲击地压矿井产能科学提升顶层设计
Figure 13. Top-level design for scientific improvement of productivity in rock burst mine
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图 14 科学产能提升下的冲击地压矿井风险调控示意
Figure 14. Schematic diagram of risk control of rock burst mine under scientific productivity improvement
表 1 采动影响下推进速度综合确定表
Table 1 Comprehensive table for determining advancing speed under the influence of mining activities
确定推进速度V 分区域确定推进速度Vqy 分时期确定推进速度Vsq 综合确定推进速度 看力度确定推进速度Vld Vqy∪Vld=Va Vsq∪Vld=Vb Va∪Vb=Ve 看水平确定推进速度Vsp Vqy∪Vsp=Vc Vsq∪Vsp=Vd Vc∪Vd=Vf 综合确定推进
速度Va∪Vc=Vg Vb∪Vd=Vh Va∪Vb∪Vc
∪Vd=Vi
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表 2 基于冲击危险区域对推进速度进行确定
Table 2 Determination of advancing speed based on rock burst hazard zones
冲击危险区域 推进速度 产能类型 无 高 增产 弱 中 稳产 中 低 保产 强 较低 降产
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表 3 矿井状态不同时期相应推进速度调整
Table 3 Adjustment table of corresponding advancing speed of overlying strata structure in different stable periods
矿井状态 采掘扰动释量 推进速度 产能类型 稳定期 较小 适当增速推进 增产 小 正常推进 稳产 非稳定期 大 适当调减推进 保产 较大 停工停产 降产
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