涡北煤矿1.5Mta新井设计【专题综放沿空留巷围岩应力控制及支护技术研究】.docx

1、摘要本设计包括三个部分：一般部分、专题部分和翻译部分。一般部分为涡北煤矿1.50 Mt/a新井设计。涡北煤矿位于安徽省亳州市境内，东有京九铁路，西有濉阜铁路，交通便利。井田走向长度约6 km，倾向长度约3.2 km，面积约19 km2。主采煤层为8号煤层，平均倾角为18，平均厚度为9.2m。井田工业储量为186.92 Mt，可采储量为109.08 Mt，矿井服务年限为55.9 a。矿井正常涌水量为250 m3/h，最大涌水量为280 m3/h。矿井绝对瓦斯涌出量为22.3 m3/min，属于低瓦斯矿井。根据井田地质条件，提出四个技术上可行的开拓方案。方案一：立井两水平开拓上下山开采，暗斜井延深

2、；方案二：立井两水平开拓上下山开采，立井直接延深；方案三：立井两水平开拓上山开采，暗斜井延深；方案四：立井两水平开拓上山开采，立井直接延深。通过技术经济比较，最终确定方案三为最优方案。一水平标高-700 m，二水平标高-1000 m。设计首采区采用采区准备方式，工作面长度180 m，采用综采放顶煤采煤法，矿井年工作日为330 d，工作制度为“三八制”。大巷采用胶带输送机运煤，辅助运输采用矿车运输。矿井通风方式为中央并列式。专题部分题目：综放沿空留巷围岩应力控制及支护技术研究。沿空留巷技术是工作面采煤后沿采空区边缘维护原回采巷道的护巷方法。这种技术完全取消了区段煤柱，有利于区段间工作面的接替，由

3、于留巷期间所留巷道的维护难度较大，需要在巷旁支护，该方法多应用于薄及中厚煤层中。本文介绍了综放沿空留巷围岩结构和围岩应力，进而运用数值模拟软件对巷内支护和巷旁支护进行了分析，最后结合潞安常村矿的实例来证明所选用的方法是行之有效的。翻译部分题目：Stress distribution around mine workings。矿山巷道围岩应力分布的计算方法。关键词： 涡北煤矿；立井；暗斜井；采区布置；中央并列式通风；放顶煤采煤法；综放沿空留巷ABSTRACTThis design can be divided into three sections: general design, monogr

4、aphic study and translation of an academic paper.The general design is about a 1.50 Mt/a new underground mine design of Guobei coal mine.Guobei coal mine lies in Hozhou City, Anhui province.As Jingjiu railway runs in the west of the mine field and Suifu railway runs in the east of the mine field, th

5、e traffic is convenient.Its about 6 km on the strike and 3.2 km on the dip, with the 19 km2 total horizontal area.The minable coal seam is 8 with an average thickness of 9.2 m and an average dip of 18.The proved reserves of this coal mine are 186.92 Mt and the minable reserves are 109.08 Mt, with a

6、mine life of 55.9 a. The normal mine inflow is 250 m3/h and the maximum mine inflow is 280 m3/h. The mine gas emission rate is 22.3 m3/min, the mine belongs to low gas mine. Based on the geological conditions of the mine, I bring forward four available projects in technology.The first is vertical sh

7、aft development with two mining levels and the first level at -700m and the second level at -900m and extension of blind inclined shaft; the second is vertical shaft development with two mining levels and the first level at -700m and the second level at -900m and extension of vertical shaft; the thi

8、rd is vertical shaft development with two mining levels and the first level at -700m and the second level at -1000m and extension of blind inclined shaft; the last is vertical shaft development with two mining levels and the first level at -700m and the second level at -1000m and extension of vertic

9、al shaft. The third project is the best comparing with other three projects in technology and economy.The first level is at -700 m.The second level is at -1000 m.Designed first mining district makes use of the method of the mining district preparation.The length of working face is 180 m, which uses

10、fully-mechanized coal caving mining method. The working system is “three-eight” which produces 330 d/a.Main roadway makes use of belt conveyor to transport coal resource, and mine car to be assistant transport. The type of mine ventilation system is center ventilation.The monographic study is caving

11、 to stay in the surrounding rock stress control and support technical research. The gob is supporting roadway to maintain the original mining tunnel face coal mining along the edge of the goaf. This technique completely abolished Coal Pillars, the successor of the section between the face during the

12、 stay, Lane left the roadway maintenance difficult, the offshoot of care in Lane, the method used in the thin and thick coal seamin. This article describes caving to stay in the surrounding rock structure and the surrounding rock stress, thus lane support and Lane offshoot of care were analyzed usin

13、g numerical simulation software, last combined with the Luan Changcun mine instance to prove that the method chosento be effective.The translated academic paper is stress distribution around mine workings.Keywords: Guobei coal mine ;Vertical shaft; Blind inclined shaft; Mining district preparation;

14、Coal caving mining ; Center ventilation; Caving gob-side entry rataining目 录一般部分1 矿区概述及井田地质特征11.1 矿区概述11.2 井田地质特征31.3 煤层特征82 井田境界和储量132.1 井田境界132.2 矿井工业储量142.3 矿井可采储量163 矿井工作制度、设计生产能力及服务年限193.1 矿井工作制度193.2 矿井设计生产能力及服务年限194 井田开拓214.1 井田开拓的基本问题214.2 矿井基本巷道315 准备方式采取巷道布置435.1 煤层的地质特征435.2 采区巷道布置及生产系统445

15、.3 采区车场选型设计496 采煤方法506.1 采煤工艺方式506.2 回采巷道布置617 井下运输637.1 概述637.2 采区运输设备选择657.3 大巷运输设备选择668 矿井提升688.1 概述688.2 主副井提升689 矿井通风及安全729.1 矿井地质、开拓、开采概况729.2 矿井通风系统的确定729.3 矿井风量计算769.4 矿井通风阻力819.5 矿井通风设备选型869.6 特殊灾害的预防措施9110 设计矿井基本技术经济指标92参考文献93专题部分 综放沿空留巷围岩应力控制及支护技术研究941 绪论941.1 问题的提出及研究意义941.2 研究现状942 综放沿空留巷围岩结构983 沿空留巷围岩应力分布984 沿空巷道围岩控制理论1004.1 煤层巷道失稳力学机理1014.2 综放沿空巷道破坏形式1025 综放沿空留巷支护结构可靠性分析的必要性1026 巷内支护形式1037 综放沿空巷道帮锚杆剪切破坏分析1047.1 综放沿空留巷矿压与数值计算模型1047.2 顶板锚杆剪切变形的数值模拟1068 巷旁支护形式1079 综放沿空留巷充填支护研究1099.1 综放沿空留巷充填概述1099.2 综放巷内充填原位沿空留巷围岩结构