矸石基含水层注浆改造新型材料实验与应用

发布时间：2018-03-13 06:36

本文选题：注浆材料研发　切入点：力学性能　出处：《煤炭学报》2017年11期 　论文类型：期刊论文

【摘要】：高承压灰岩含水层上煤炭开采,经常需要对强含水层进行注浆改造,因含水层发育规模巨大,注浆材料用量动辄数万吨。在充分利用地下工程址区厂矿企业固体废弃物煤矸石基础上,研发了一种适用于含水层改造的新型无机注浆材料。通过组分筛选试验、力学性质测定试验、获取了材料的抗折强度、抗压强度、渗透系数等宏观力学性能;采用SEM微观分析手段,分析了注浆结石体的微观结构性能。综合力学性能、经济因素、环境效益,对比了新型材料与常规注浆材料的适用性。结合现场试验,验证了新型注浆材料的效果。研究结果表明:在水泥含量为35%时,新型注浆材料的早期强度与后期强度均高于水泥含量为40%时水泥-黏土浆液的同期强度。材料的最佳配合比为水泥30%,黏土10%,煤矸石60%。该材料体系结石体28 d抗压强度3.4 MPa,28 d抗折强度1.7 MPa,渗透系数1.794×10-7m/s,能够满足含水层改造需求,对类似工程具有借鉴作用。
[Abstract]:High pressure limestone aquifer on coal mining, often need to strong aquifer grouting, because the aquifer development scale, grouting material amount of tens of thousands of tons. To make full use of underground engineering site industrial solid waste of coal gangue on the basis of a new type of inorganic grouting material developed for aquifer transformation. Through the screening test components, mechanical properties test, the flexural strength and compressive strength of materials, mechanical properties such as permeability coefficient; SEM by means of microscopic analysis, microstructure properties of grouting are analyzed. The comprehensive mechanical properties, economic factors, environmental benefits, compared the applicability of new materials and conventional grouting material. Combined with the field test, to verify the new type of grouting material. The results show that: in the cement content is 35%, the early strength of new type of grouting material strength and post Over the same period of strength are higher than the cement content of 40% cement clay grout. The best material mix ratio is 30% of cement, 10% clay, coal gangue 60%. the material system of stone body 28 d compressive strength of 3.4 MPa, 28 d and 1.7 MPa flexural strength, permeability coefficient of 1.794 * 10-7m/s, can meet the demand of aquifer transformation, has reference to similar projects.

【作者单位】：山东大学岩土与结构工程研究中心;山东能源集团有限公司;山东省标准化研究院;
【基金】：国家重点研发计划资助项目(2016YFC0801604)
【分类号】：TB321;TD745

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