不同试验条件下深部下组煤底板水岩相互作用特征

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摘要为探讨济北矿区深部下组煤底板岩石与水相互作用规律，以岱庄煤矿首采面底板5种不同类型岩性的岩样为研究对象，在自来水与饱和食盐水浸泡后并结合自然浸泡与湿–干交替循环浸泡条件下两两组合进行为期52 d的水稳性和相关电导率试验。研究结果表明：(1) 根据20个岩样掉渣、表面裂隙、岩样开裂、饱水后强度和崩解等现象统计对比分析，发现不论是自来水还是饱和食盐水在自然浸泡条件下5种岩样的水稳性均相对较好，浸水后基本不崩解，但在湿–干交替循环作用条件下均会发生崩解现象；(2) 通过对自来水浸泡岩样在自然与湿–干交替条件下电导率测试，发现所有岩样溶液中电导率增加幅度随时间均表现出比较明显的3个阶段，但同一岩样在不同条件下电导率增加幅度随时间变化具有较大差异性，湿–干交替岩样的电导率增加幅度明显大于自然浸泡岩样的；(3) 电导率和岩样质量损失率基本呈正相关关系。研究结果对深部水岩相互作用导致岩石劣化的微观机制研究提供参考。

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关键词 ：岩石力学；水岩作用；深部下组煤底板岩石；湿&ndash, 干循环作用；水稳性特征；电导率

Abstract：In order to study the characteristics of interaction process between deep rock of lower coal seam floor and water in Jibei mining area，five different types of rocks are used for water stability test in laboratory by natural water and saturated salt water soaking. Through water stability test and conductivity measuring for 52 days，the results are drawn as follows. (1) The water stability of nature soaked rocks is good，and none of them have basic degradation according to phenomena and test results of 20 samples in dropping residue，superficial cranny，rock cracking，strength change，swelling and degradation. However，the samples have obvious degradation by wetting- drying cycle effect. (2) There are three phases to conductivity increasing range in natural water by normal condition and wetting-drying cycle effect，but the conductivities of same sample under different conditions show big difference in increasing over time. The conductivity in wetting-drying cycle effect is obviously larger. (3) It is positive relevance between rock conductivity and decreasing rate of mass. The study results provide references for micro-mechanism study of deterioration for rocks under water-rock interaction in the deep coal mining.

Key words： rock mechanics water-rock interaction deep rocks of lower coal seam floor wetting-drying cycle effect characteristics of water stability conductivity

收稿日期: 2012-12-20

引用本文:

朱术云1，宋淑光2，孙强1，颜标1，王成田2. 不同试验条件下深部下组煤底板水岩相互作用特征[J]. 岩石力学与工程学报, 2014, 33(sl): 3231-3237.
ZHU Shuyun1，SONG Shuguang2，SUN Qiang1，YAN Biao1，WANG Chengtian2. CHARACTERISTICS OF INTERACTION PROCESS BETWEEN DEEP ROCK OF LOWER COAL SEAM FLOOR AND WATER UNDER DIFFERENT TEST CONDITIONS. , 2014, 33(sl): 3231-3237.

链接本文:

http://www.rockmech.org/CN/Y2014/V33/Isl/3231

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