Safe distance for blastingBlasting hazards: blasting earthquakes, air shock waves, scattered debris, toxic gases. Blasting must determine the scope and safety distance of blasting hazards, and set up warning and safety protection measures.① Safe distance for blasting flying stonesBlasting typeMinimum safe distance for individual flying stonesShallow hole blasting to break large blocks300mShallow h...

Safety rectification of open-pit minesStarting from layered mining< Br/>From top to bottom, layered mining is a fundamental principle of open-pit mining. The relevant regulations have clear limits on the stage height of open-pit mines under different lithology and operation methods. However, there are still many small and medium-sized mines that adopt a very primitive non layered, high-level minin...

Key points for handling poisoning and suffocation accidents(1) Before entering the dangerous area, rescuers must wear protective equipment such as Gas mask and self rescuers, and check their air tightness to avoid poisoning and suffocation accidents of rescuers, which may cause more casualties.(2) Move the poisoned person to a well ventilated and fresh place, lie still and keep warm, and assess th...

MT11A Product Acceptance and Release Conference&Nbsp& Nbsp& Nbsp; On June 26, 2018, the acceptance and product launch of the MT11A new tunnel anchor rod trolley jointly developed by China Railway Tunnel Bureau Group and Zhejiang Zhigao Machinery Co., Ltd. was held in Quzhou, Zhejiang. The celebration ceremony was arranged in the Zhejiang Zhigao Mechanical Drilling Machine Assembly Workshop, with a...

What steps does Hunan Province take to promote the construction of green mines< Br/>nine hundredBy the end of December 2017, June 2018, and September 2018, complete the preparation of work plans for the construction of green mines at the provincial, municipal, and county levels;2. Develop green mine construction standards: to be launched at the end of December 2017 and released before the end of J...

On May 31st, JD announced the official launch of its building materials business. Various merchants and individual consumers will be able to purchase various building materials such as sand and gravel cement, pipes and fittings, coatings, etc. on the JD platform in the future< Br/>nine hundredDisadvantages of the construction materials industry:Long term rough operation, lengthy offline transactio...

&Nbsp; In recent years, there has been Cut throat competition in the auction of river sand mining, which has led to the fact that the transfer transaction price is falsely high and has brought great pressure to the sand mining supervision. In addition, illegal sand mining is widely distributed and repeatedly prohibited. As a result, the sand and gravel industry has experienced an unprecedented sto...

Overview of Water Medium Energy Exchange Blasting TechnologyWater medium energy exchange blasting is an analysis of the blasting mechanism from the perspectives of thermodynamics and chemistry. If in&quo; Explosion Thermodynamic system; Add&quo; to; A certain amount; According to the law of thermodynamics and the law of indestructibility of matter (Conservation of mass); Yes;, In the adiabatic; Ex...

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April 11-13, 2018Haosheng Hotel, Flower City, Kunming, Yunnan, ChinaBooth: A27nine hundredDisplay machine: New mining trolley UP45nine hundred and oneProduct features: Various underground construction equipment in China were previously imported and expensive, resulting in extremely high maintenance costs. The latest UP45 mining equipment developed by Zhigao Machinery is an efficient and profession...

&Nbsp& Nbsp; On June 7th, the 9th International Infrastructure Investment and Construction Summit Forum opened grandly in Macau. Fernando Chui, Chief Executive of the Chief Executive of Macau, Gao Yan, Vice Minister of Commerce of China, Zheng Xiaosong, Director of the Liaison Office of the Central People's Government in the Government of Macau, Yuan Hengge, Deputy Commissioner of the Office of th...

Today, enter" on Baidu, the world's largest Chinese search engine; Green Mines®, Within 0.008 seconds, 12.7 million related items, including 113000 images, can be displayed. If put 10 years ago, this number is incredible< Br data filtered="filtered"/>&Quot; In 2012, we held a green mining experience exchange meeting in Manzhouli, Inner Mongolia. At that time, the venue could only accommod...

On June 4, 2015, the annual conference" International Infrastructure Investment and Construction Summit Forum; Grand opening in Macau as scheduled. This grand event attracted 44 guests at the deputy ministerial level and above from 31 countries and regions, including Costa Rican Vice President Faas and Bahamas Deputy Prime Minister Davis. Over 1000 representatives from over 500 international ...

New Actions in Central Environmental Protection Supervision Work! Are all sand and gravel enterprises ready?

Recently, the Hunan Provincial Department of Land and Resources issued the "Key Points for Mineral Development and Management in 2018", emphasizing the comprehensive completion of the clearance and withdrawal of mining rights in natural reserves, strict on-site verification of the scope of mining rights applications, and rejection of those that do not comply with relevant industrial policies and planning, safety and environmental conditions, to ensure the timely completion of the rectification task of feedback issues from central environmental protection inspectors by the end of June this year.