其次是水泥膨浆和接缝混凝土，接缝面不铺筑任何接缝面材料的试块，劈裂抗拉强度最小。
Expansive cement paste and joint concrete are next. And the bond splitting tensile strength of joint surface without bond material is least.
看重分析了长壁采煤工作面煤壁应力特点和冲击劈裂式采煤的相互作用关系，提出了冲击破煤的作业方式。
The paper emphatically analyses the interaction between the wall stress characteristic and coal getting by impact on the longwall face, proposes the work pattern of coal breaking by impact.
试验结果表明，各种接缝面材料中，粉煤灰改性砂浆的劈裂抗拉强度最大，效果最好。
The test results indicated that the bond splitting tensile strength of modified fly ash mortar was best in joint materials of sorts.
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