![153. Standard of ventilation.
(1)It shall be the duty of the owner, agent or manager of every mine to take such steps as are necessary to constantly provide in
all parts of the mine belowground which are not sealed off, adequate ventilation to clear away smoke, steam and dust, to dilute
gases that are inflammable or noxious so as to render them harmless, to provide air containing sufficient oxygen and to prevent
such excessive rise of temperature or humidity which may be harmful to the health of persons.]
(2)For the purposes of securing adequate ventilation as specified in sub-regulation (1), the owner, agent and manager shall ensure
that-
(a)in every ventilating district, not less than six cubic meters per minute of air per person employed in the district on the largest
shift or not less than 2.5 cubic meters per minute of air per tonne of daily output, whichever is larger, passes along the last
ventilation connection in the district which means the in-bye most gallery in the district along which the air passes;
(b)at every place in the mine where persons are required to work or pass, the air does not contain less than 19 per cent. of oxygen
or more than 0.5 per cent. of carbon dioxide or any noxious gas in quantity likely to affect the health of any person;
(c)the percentage of inflammable gas does not exceed 0.75 in the general body of the return air of any ventilating district and 1.25
in any place in the mine;
(d)the wet bulb temperature in any working place does not exceed 33.5 degrees centigrade, and where the wet bulb temperature
exceeds 30.5 degrees centigrade, arrangements are made to ventilate the same with a current of air moving at a speed of not less
than one meter per second; and
(e)for ensuring compliance with the provisions of clauses (b), (c) and (d) of this sub-regulation, air samples and temperature
readings shall be taken at least once in every thirty days and the results shall be recorded in a bound paged book kept for the
purpose:Provided that at any mine or part, where special conditions exist, the Chief Inspector may, by an order in writing and
subject to such conditions as he may specify therein, approve a ventilation scheme in variance with the aforesaid provisions.
3)In every mine, ventilation as specified in sub-regulation (2) shall be produced by a suitable mechanical ventilator.
(4)If with respect to any mine or part thereof the Regional Inspector is of the opinion that the ventilation is not adequate, he may
by an order in writing, require the installation and maintenance of such mechanical ventilator as is capable of producing adequate
ventilation in the mine or part.](https://image.slidesharecdn.com/mn241papersolving12345566-250504043424-b78f6f81/85/mn241-paper-solution-by-mining-engineering-student-22-320.jpg)
mn241 paper solution by mining engineering student.
- 1. MN 241 1
- 15. Inspect the lamp: Ensure the lamp is clean, assembled correctly, and in good working order. Check the wick, glass, gauze, and all other components. Light the lamp: Light the lamp in a clean atmosphere, away from any potential gas sources. 2. Testing for Gas: •Approach cautiously: Slowly approach the area where you suspect gas may be present. •Observe the flame: Carefully watch the flame for any changes. ◦ Elongated flame: If the flame elongates or becomes larger, it indicates the presence of flammable gas. ◦ Blue cap: A bluish flame or halo around the main flame also suggests gas.
- 21. what is Standards of ventillalation and why its importance in the u/g mine enivornment ? Safety and Health: •Toxic Gases: Mines can contain dangerous gases like methane (explosive), carbon monoxide (poisonous), hydrogen sulfide (toxic), and radon (radioactive). Studying the environment helps identify their sources, concentrations, and how to control them. •Oxygen Deficiency: Poor ventilation can lead to oxygen deficiency, causing miners to become weak and impairing their judgment. Monitoring oxygen levels is vital. •Dust and Respirable Particles: Dust from mining operations can cause lung diseases like black lung. Understanding dust generation and movement allows for effective dust suppression strategies. •Temperature and Humidity: High temperatures and humidity can lead to heat stress, reducing workers' efficiency and increasing the risk of heatstroke. Environmental studies help manage these factors. •Ground Stability: Understanding rock mechanics, geological structures, and water flow is essential for preventing roof falls and other ground instability issues. Efficient Operation: •Ventilation System Design: Effective ventilation is crucial for supplying fresh air and removing contaminants. Studying the environment helps design and optimize ventilation systems. •Equipment Selection: Understanding the environment helps choose equipment that can operate safely and efficiently under specific conditions (e.g., temperature, humidity, gas presence). •Resource Management: Knowledge of groundwater flow and potential hazards helps in planning extraction strategies and managing resources effectively. Standards of Mine Ventilation: Mine ventilation standards are regulations and guidelines that dictate the minimum requirements for airflow, air quality, and contaminant control in underground mines. They are crucial because they: •Ensure Worker Safety: Standards set limits for exposure to hazardous gases, dust, and temperature extremes, protecting miners from immediate and long- term health risks. •Mandate Monitoring and Control: They require regular monitoring of air quality and ventilation parameters, ensuring that control measures are effective. •Promote Best Practices: Standards often reflect the best available knowledge and technology for ventilation management, encouraging mines to adopt the most effective strategies. •Legal Compliance: Adhering to ventilation standards is a legal requirement in most mining jurisdictions, and non-compliance can lead to penalties and even mine closure.
- 22. 153. Standard of ventilation. (1)It shall be the duty of the owner, agent or manager of every mine to take such steps as are necessary to constantly provide in all parts of the mine belowground which are not sealed off, adequate ventilation to clear away smoke, steam and dust, to dilute gases that are inflammable or noxious so as to render them harmless, to provide air containing sufficient oxygen and to prevent such excessive rise of temperature or humidity which may be harmful to the health of persons.] (2)For the purposes of securing adequate ventilation as specified in sub-regulation (1), the owner, agent and manager shall ensure that- (a)in every ventilating district, not less than six cubic meters per minute of air per person employed in the district on the largest shift or not less than 2.5 cubic meters per minute of air per tonne of daily output, whichever is larger, passes along the last ventilation connection in the district which means the in-bye most gallery in the district along which the air passes; (b)at every place in the mine where persons are required to work or pass, the air does not contain less than 19 per cent. of oxygen or more than 0.5 per cent. of carbon dioxide or any noxious gas in quantity likely to affect the health of any person; (c)the percentage of inflammable gas does not exceed 0.75 in the general body of the return air of any ventilating district and 1.25 in any place in the mine; (d)the wet bulb temperature in any working place does not exceed 33.5 degrees centigrade, and where the wet bulb temperature exceeds 30.5 degrees centigrade, arrangements are made to ventilate the same with a current of air moving at a speed of not less than one meter per second; and (e)for ensuring compliance with the provisions of clauses (b), (c) and (d) of this sub-regulation, air samples and temperature readings shall be taken at least once in every thirty days and the results shall be recorded in a bound paged book kept for the purpose:Provided that at any mine or part, where special conditions exist, the Chief Inspector may, by an order in writing and subject to such conditions as he may specify therein, approve a ventilation scheme in variance with the aforesaid provisions. 3)In every mine, ventilation as specified in sub-regulation (2) shall be produced by a suitable mechanical ventilator. (4)If with respect to any mine or part thereof the Regional Inspector is of the opinion that the ventilation is not adequate, he may by an order in writing, require the installation and maintenance of such mechanical ventilator as is capable of producing adequate ventilation in the mine or part.
- 25. Numerical asked in pyq