Stress distribution rules and deformation and failure properties of coal and rockbodies influenced by mining were analyzed.Experimental research on permeability of coaland rock samples under different loading conditio...Stress distribution rules and deformation and failure properties of coal and rockbodies influenced by mining were analyzed.Experimental research on permeability of coaland rock samples under different loading conditions was finished in the laboratory.In-situmeasurement of coal permeability influenced by actual mining was done as well.Theoryanalysis show that permeability varied with damage development of coal and rock understress,and the influence of fissure on permeability was greatest.Laboratory results showthat under different loading conditions permeability was different and it varied with stress,which indicated that permeability was directly related to the loading process.In-situ testsshowed that permeability is related to abutment stress to some degree.The above resultsmay be referenced to gas prevention and drainage.展开更多
目的:观察细银质针导热松解术治疗肱二头肌长头腱炎(myotenositis of the long head of biceps brachii, MLHB)的有效性和安全性。方法:纳入MLHB病人102例,采用随机数字表法平均分为细银质针导热组(A组)和局部注射组(B组),比较两组治疗...目的:观察细银质针导热松解术治疗肱二头肌长头腱炎(myotenositis of the long head of biceps brachii, MLHB)的有效性和安全性。方法:纳入MLHB病人102例,采用随机数字表法平均分为细银质针导热组(A组)和局部注射组(B组),比较两组治疗前后的肩关节功能评分(american shoulder and elbow surgeons’form score, ASES)、腱鞘积液厚度和长头腱周长。结果:A组治疗后1周的ASES显著提高、腱鞘积液厚度明显降低,治疗后4周长头腱周长显著减小;B组治疗后5 min的ASES明显升高,治疗后4周较2周的ASES明显降低;治疗后1周长头腱周长明显减小、2周腱鞘积液厚度明显减少。治疗后4周A组ASES评分以及腱鞘积液厚度均优于B组。两组无明显不良反应。结论:细银质针导热松解术及局部药物注射均能改善MLHB的临床症状,细银质针导热松解术远期疗效优于局部药物注射。展开更多
目的:观察川芎清脑颗粒治疗慢性偏头痛的临床疗效和安全性。方法:采用多中心、随机、双盲、安慰剂对照、前瞻性试验设计,纳入偏头痛病人214例,采用数字随机表法分为川芎清脑颗粒治疗组(治疗组,n=107)和安慰剂对照组(对照组,n=107),服药4...目的:观察川芎清脑颗粒治疗慢性偏头痛的临床疗效和安全性。方法:采用多中心、随机、双盲、安慰剂对照、前瞻性试验设计,纳入偏头痛病人214例,采用数字随机表法分为川芎清脑颗粒治疗组(治疗组,n=107)和安慰剂对照组(对照组,n=107),服药4周,比较两组病人服药4周和停药4周时的头痛评分,采用疼痛数字评分法(numeric rating scales, NRS)、头痛月发作次数,记录药物的不良反应。结果:两组病人治疗前头痛的NRS评分和头痛月发作次数无明显差异(P> 0.05)。治疗组服药4周时的头痛NRS评分明显低于治疗前基础值(3.75 vs. 4.49,P <0.05),头痛月发作次数明显少于治疗前(2.80 vs. 7.51, P <0.001);停药4周时,头痛NRS评分进一步降低,明显低于服药4周时的头痛NRS评分(1.65 vs. 3.75, P <0.001),头痛月发作次数也进一步降低,明显低于服药4周时(1.50 vs.2.80, P <0.001);对照组服药4周和停药4周时的NRS评分和头痛月发作次数较治疗前无明显变化(P> 0.05)。治疗组服药4周时的头痛NRS评分明显低于对照组(3.75 vs. 4.34,P <0.001),头痛月发作次数明显少于对照组(2.80 vs.6.09,P <0.001);停药4周时,治疗组的头痛NRS评分显著低于对照组(1.65 vs. 4.16,P <0.001),头痛月发作次数显著少于对照组(1.50 vs. 6.45,P <0.001)。服药过程中及停药后4周,两组病人的血常规、肝肾功、心电图均未见显著异常改变,未发生不良事件。结论:川芎清脑颗粒可明显降低轻中度偏头痛病人的疼痛程度和发作次数,无明显不良反应。展开更多
In order to determine how a roadway withstands a momentum wave and determinethe extent of damage to rock surrounding the roadway under different force wavepeak impacts,the roadway dynamic response state was analysed u...In order to determine how a roadway withstands a momentum wave and determinethe extent of damage to rock surrounding the roadway under different force wavepeak impacts,the roadway dynamic response state was analysed using numerical simulationmethod.The roadway's critical peak force wave and fracture region under dynamicwave action were put forward.It is concluded that the method has practical value to roadwaysupport and rockburst prevention.展开更多
基金Supported by the National Major Fundamental Research Program of China(973 Project)(2005CB221503)National Science Foundation of China(50544010)
文摘Stress distribution rules and deformation and failure properties of coal and rockbodies influenced by mining were analyzed.Experimental research on permeability of coaland rock samples under different loading conditions was finished in the laboratory.In-situmeasurement of coal permeability influenced by actual mining was done as well.Theoryanalysis show that permeability varied with damage development of coal and rock understress,and the influence of fissure on permeability was greatest.Laboratory results showthat under different loading conditions permeability was different and it varied with stress,which indicated that permeability was directly related to the loading process.In-situ testsshowed that permeability is related to abutment stress to some degree.The above resultsmay be referenced to gas prevention and drainage.
文摘目的:观察细银质针导热松解术治疗肱二头肌长头腱炎(myotenositis of the long head of biceps brachii, MLHB)的有效性和安全性。方法:纳入MLHB病人102例,采用随机数字表法平均分为细银质针导热组(A组)和局部注射组(B组),比较两组治疗前后的肩关节功能评分(american shoulder and elbow surgeons’form score, ASES)、腱鞘积液厚度和长头腱周长。结果:A组治疗后1周的ASES显著提高、腱鞘积液厚度明显降低,治疗后4周长头腱周长显著减小;B组治疗后5 min的ASES明显升高,治疗后4周较2周的ASES明显降低;治疗后1周长头腱周长明显减小、2周腱鞘积液厚度明显减少。治疗后4周A组ASES评分以及腱鞘积液厚度均优于B组。两组无明显不良反应。结论:细银质针导热松解术及局部药物注射均能改善MLHB的临床症状,细银质针导热松解术远期疗效优于局部药物注射。
文摘目的:观察川芎清脑颗粒治疗慢性偏头痛的临床疗效和安全性。方法:采用多中心、随机、双盲、安慰剂对照、前瞻性试验设计,纳入偏头痛病人214例,采用数字随机表法分为川芎清脑颗粒治疗组(治疗组,n=107)和安慰剂对照组(对照组,n=107),服药4周,比较两组病人服药4周和停药4周时的头痛评分,采用疼痛数字评分法(numeric rating scales, NRS)、头痛月发作次数,记录药物的不良反应。结果:两组病人治疗前头痛的NRS评分和头痛月发作次数无明显差异(P> 0.05)。治疗组服药4周时的头痛NRS评分明显低于治疗前基础值(3.75 vs. 4.49,P <0.05),头痛月发作次数明显少于治疗前(2.80 vs. 7.51, P <0.001);停药4周时,头痛NRS评分进一步降低,明显低于服药4周时的头痛NRS评分(1.65 vs. 3.75, P <0.001),头痛月发作次数也进一步降低,明显低于服药4周时(1.50 vs.2.80, P <0.001);对照组服药4周和停药4周时的NRS评分和头痛月发作次数较治疗前无明显变化(P> 0.05)。治疗组服药4周时的头痛NRS评分明显低于对照组(3.75 vs. 4.34,P <0.001),头痛月发作次数明显少于对照组(2.80 vs.6.09,P <0.001);停药4周时,治疗组的头痛NRS评分显著低于对照组(1.65 vs. 4.16,P <0.001),头痛月发作次数显著少于对照组(1.50 vs. 6.45,P <0.001)。服药过程中及停药后4周,两组病人的血常规、肝肾功、心电图均未见显著异常改变,未发生不良事件。结论:川芎清脑颗粒可明显降低轻中度偏头痛病人的疼痛程度和发作次数,无明显不良反应。
基金Supported by the National Key Technology R&D Program in 11 th Five Years Plan of China(2006BAK03B06)
文摘In order to determine how a roadway withstands a momentum wave and determinethe extent of damage to rock surrounding the roadway under different force wavepeak impacts,the roadway dynamic response state was analysed using numerical simulationmethod.The roadway's critical peak force wave and fracture region under dynamicwave action were put forward.It is concluded that the method has practical value to roadwaysupport and rockburst prevention.
