Guangdong Heyuan city earthquake 0 kilometers earthquake or collapse caused by karst cave reporter survey: Guangdong Heyuan city earthquake "0 kilometers" 3 earthquake how did it happen? Xinhua news agency, Guangzhou, October 29th, new media special issue: reporter survey: Guangdong Heyuan earthquake "0 kilometers" of the magnitude 3 earthquake, how did it happen? Xinhua News Agency reporter Tian Jianchuan according to the determination of China seismic network, 28 15:55 on the 3 earthquake that occurred in Lianping County of Guangdong Heyuan City, the focal depth of 0 km. The depth of the earthquake "0 kilometers" is not very common. How did the earthquake occur? What’s the difference between it and the public familiar tectonic earthquakes? Reporters rushed to the scene for investigation. The earthquake continued for more than 10 seconds, the reporter saw the mountain slide, the epicenter of the earthquake measured by the Chinese seismological network is "24.14 degrees north latitude, 114.62 degrees east longitude"". According to the monitoring center of Guangdong provincial earthquake, the epicenter is located in Lianping County town of oil mud chutang iron ore, Dading Iron Mine Area, the seismic intensity is third degree. A security guard at the Limited by Share Ltd factory in Guangdong’s top coal mine said he was on duty in the security room when the earthquake happened, and lasted for more than ten seconds. "There are frequent blasting operations in the mining area, and they can also be felt, but this feeling is more intense."." Dongyuan County, Jian Jian Town, Jian County, next door, is about 1.8 kilometers away from the epicenter. Reporters 29 in the vicinity of the company’s mining area, an abandoned mining pit around the obvious landslide traces. Dongyuanxian Kennedy based Mining Company Limited manager assistant Deng Zhanyuan said, on the morning of 29 company investigation found that the landslide, landslide area of about 300 square meters. Reporters at the scene, the small mountain still slipped, the scene of "Hua Hua" sound, accompanied by dust smoke. The local department of land laid out a warning line on the periphery of the landslide. The possibility of earthquake caused by mining blasting has been excluded. How did the earthquake cause? Is it caused by mining blasting in mining area? Zhang Zhenghua, deputy general manager of Guangdong top mining Limited by Share Ltd, said that the company implemented about 20 times a month blasting, the use of explosives each blasting in about 5 tons, blasting time is 17:30 per day. "Yesterday, the earthquake happened at about four p.m., not until the explosion time of our company. We decided that the explosion was not implemented." Zhang Zhenghua said. Deng Zhanyuan said that due to the downturn in iron ore prices in the past two years, the company is almost at a loss operation, 6 months ago has been technically shut down mining operations, the recent period has not been implemented blasting. The location of landslide is the mining slope of abandoned mining area which was abandoned 8 years ago. Reporters on the scene saw that there was no trace of mining operations, the demolition was abandoned in the mine ventilation fan has been obviously rusty old. Reporters from multiple sources Lianping county and Dongyuan County learned that the epicenter is located in the remote mountains, no one living, no industrial and mining operations. Zhu Zhenqiang, director of the Seismological Bureau of Heyuan, said that the induced factors of "0 km earthquake" may include cave collapse, mine collapse, landslide and artificial blasting, etc.. At present, the possibility of artificial blasting has been ruled out. Earthquake or cave collapse 6

广东河源市震源0公里地震或由溶洞塌陷导致   记者调查:广东河源市震源“0千米”的3级地震是怎么发生的?   新华社广州10月29日新媒体专电 题:记者调查:广东河源市震源“0千米”的3级地震是怎么发生的?   新华社记者田建川   据中国地震台网测定,28日15时55分在广东河源市连平县发生3.0级地震,震源深度0千米。震源深度“0千米”的地震并不多见,此次地震是怎么发生的,它跟公众熟知的构造地震有什么区别?记者赶赴现场进行了调查。   地震持续10余秒 记者目睹山体滑落   中国地震台网测定的此次震中位置是“北纬24.14度,东经114.62度”。根据广东省地震监测中心的监测,震中位于连平县油溪镇泥竹塘铁矿、大顶铁矿区域,震中烈度为Ⅲ度。   广东大顶矿业股份有限公司厂区的一名保安说,“地震”发生时,他正在保安室值班,有明显震感,持续了十几秒钟。“矿区经常有爆破作业,也会有震感,但这次感觉更加强烈。”   隔壁县东源县涧头镇的坚基矿业有限公司距离震中位置约1.8千米。记者29日在该公司矿区周边看到,一个废弃的采矿深坑四周有明显的山体滑坡痕迹。东源县坚基矿业有限公司矿长助理邓占元说,29日上午公司排查时发现了该滑坡,滑坡面积约300平方米。   记者现场采访时,小块山体仍有滑落,现场发出“哗哗”的响声,并伴有尘土烟雾。当地国土部门在滑坡外围布置了警戒线。   已排除采矿爆破导致地震可能性   此次地震是如何引发的?是否是矿区采矿爆破导致?广东大顶矿业股份有限公司副总经理章正华说,该公司一个月大约实施爆破20次左右,每次爆破炸药使用量在5吨左右,爆破时间为每天的17:30分。   “昨天地震发生在下午四点左右,不到我们公司的爆破时间,我们确定没有实施爆破。”章正华说。   邓占元说,由于近两年铁矿石价格低迷,公司几乎处于亏本经营,6个月前已技术性关停了矿区作业,近段时间没有实施过爆破。山体滑坡位置是该矿区8年前已经废弃的露采区采矿边坡。记者在现场看到,现场没有采矿作业的痕迹,被拆除丢弃在矿道通风口外的风机已经明显生锈老旧。   记者从连平县、东源县多个信源了解到,震中位置地处深山区,没有人居住,没有工矿业作业。   河源市地震局局长朱镇强说,“0千米地震”的诱发因素可能包括溶洞塌陷,矿井塌陷、山体滑坡和人工爆破等。目前已经排除人工爆破的可能性。   地震或由溶洞塌陷或废弃矿洞塌陷导致   广东省地震局29日给记者回复的书面材料表示,根据现场调查报告,没有发现人员伤亡情况,没有爆破事件。初步判定,“此次塌陷地震为溶洞塌陷或废弃矿洞塌陷的可能性较大”。   记者在2012年5月由广东省冶金建筑设计研究院编制的《广东省连平县泥竹塘铁矿项目土地复垦方案报告书》中看到,矿区属构造剥蚀中低山地貌,土壤抗侵蚀能力差,地下水主要储存于构造裂隙和风华裂隙中。   朱镇强说,现场调查后将情况向广东省地震局报告和研究后,从地波分析,此次地震属喀斯特地貌(岩溶地貌)内部发生的现象。邓占元说,“地震中心位于一处断裂带上。”   河源市连平县常务副县长邱亚洪说,该县目前已组织地震、地质、国土等有关部门到现场进一步核实,查清原因。记者了解到,广东省和河源市各有关部门也正继续对此次地震进行调查。(完) 责任编辑: GDN006相关的主题文章:

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