55 Industrial Accidents and Safety
This chapter takes up industrial accidents — their classification, causes and consequences — and the practice of safety management designed to prevent them.
55.1 What is an Industrial Accident?
An industrial accident is an unexpected occurrence in the course of employment that causes injury, ill-health or death to a worker, or damage to property or equipment. Three features distinguish accidents: they are unexpected, they occur in the course of employment, and they produce harm.
The Indian Employees’ Compensation Act, 1923 uses a related but narrower concept — personal injury caused to a workman by accident arising out of and in the course of his employment.
55.2 Classification of Accidents
| Classification | Categories |
|---|---|
| By severity | Fatal — non-fatal |
| By outcome | Major — minor — first-aid |
| By disability | Total permanent — partial permanent — temporary |
| By time-loss | Lost-time accident — non-lost-time accident |
| By cause | Mechanical — electrical — fire / explosion — falls — manual handling — chemicals |
| By location | Inside the workplace — commuting (going to / coming from work) |
| By reportability | Reportable — non-reportable |
55.3 Causes of Industrial Accidents
The classical model — Heinrich’s Domino Theory (1931) — identifies a sequence of five “dominos” leading to an accident.
| # | Domino | What it covers |
|---|---|---|
| 1 | Ancestry / social environment | Inherited or acquired traits |
| 2 | Personal fault | Recklessness, lack of skill |
| 3 | Unsafe act / unsafe condition | The proximate cause |
| 4 | Accident | The event itself |
| 5 | Injury | The outcome |
Removing the third domino — the unsafe act or condition — prevents the accident. Modern practice has extended Heinrich’s model — Bird’s Loss Causation Model, Reason’s Swiss Cheese Model — but the core insight remains.
55.3.1 Two Broad Causes — Unsafe Acts and Unsafe Conditions
| Type | Examples |
|---|---|
| Unsafe acts (worker behaviour) | Working without authority, removing safety guards, using defective tools, failure to use PPE, horseplay, improper lifting, working at unsafe speed |
| Unsafe conditions (workplace) | Defective equipment, inadequate guarding, poor housekeeping, inadequate lighting, hazardous arrangement, unsafe layout, excessive noise / heat / dust |
Indian and global studies converge on roughly 80% unsafe acts, 20% unsafe conditions — but the unsafe acts themselves often arise from inadequate management of conditions, training and culture.
55.4 Theories of Accident Causation
| Theory | Lead author | Core idea |
|---|---|---|
| Domino | Heinrich (1931) | Linear sequence of five dominos; remove the third |
| Multiple causation | Petersen | Many converging factors, not one cause |
| Pure-chance | — | Some accidents purely random |
| Accident-proneness | Greenwood, Woods | Some workers more prone than others |
| Energy transfer | Haddon | Accident = uncontrolled transfer of energy; control by separation, barriers, or absorption |
| Swiss cheese | James Reason | Accidents result from alignment of holes in multiple defence layers |
Reason’s Swiss Cheese model is the most cited modern framework — every defence layer (engineering controls, training, supervision, regulation) has holes (latent failures); an accident occurs when the holes align.
55.5 Accident Reporting and Indicators
Standard safety indicators measure performance over time.
| Indicator | Formula |
|---|---|
| Frequency rate | (Number of disabling injuries × 1,000,000) / Total man-hours worked |
| Severity rate | (Total man-days lost × 1,000,000) / Total man-hours worked |
| Incidence rate | (Number of injuries × 1,000) / Average number of workers |
| Lost-time injury frequency rate (LTIFR) | (Number of LTIs × 1,000,000) / Total exposure hours |
| Days away from work | Number of days lost per injury |
| Mean time between failures | For equipment / process safety |
55.6 Statutory Provisions on Accidents
Indian statutes mandate notification of accidents to the appropriate authority.
| Statute | Notice requirement |
|---|---|
| Factories Act §88 | Accident causing death or bodily injury preventing work for 48 hours — to Inspector |
| Mines Act §23 | Fatal and serious accidents — to Chief Inspector and District Magistrate |
| Plantations Labour Act §32 | Notice to Inspector |
| Employees’ Compensation Act, 1923 | Employer must report accidents within prescribed time |
| OSH Code, 2020 | Consolidated notification regime |
55.7 The Safety Function in Industry
| Component | What it covers |
|---|---|
| Safety policy | Written policy stating commitment, allocation of responsibilities |
| Safety organisation | Safety officer, safety committee, line managers |
| Safety training | Induction, periodic refresher, hazard-specific |
| Safety inspection | Periodic walk-throughs, audits, hazard hunts |
| Safety audits | Comprehensive periodic review |
| Investigation | Root-cause analysis of accidents and near-misses |
| Hazard identification & risk assessment | Systematic survey of operations |
| Emergency preparedness | Drills, fire-fighting, evacuation, mutual-aid |
| Performance monitoring | Indicators tracked, reviewed at top |
| Continuous improvement | PDCA cycles, learning from incidents |
55.8 Safety Officers and Safety Committees
| Provision | Source |
|---|---|
| Safety Officer in factories with 1,000+ workers or any hazardous process | Factories Act §40B |
| Safety Committee in hazardous-process factories | Factories Act §41G |
| Safety Officer in mines | Mines Act |
| Safety Officer in BOCW | BOCW Act §38 |
| Safety Committee with worker representation | OSH Code, 2020 |
The Safety Committee — bipartite, with equal representation of workers and management — is one of the most important institutional vehicles for accident prevention. Its mandate includes inspection, investigation of accidents, training, and recommendations.
55.9 Personal Protective Equipment (PPE)
PPE is the last line of defence in the hierarchy of controls (chapter 54). Common categories:
| Body part | PPE |
|---|---|
| Head | Helmet, hard hat |
| Eyes / face | Safety glasses, goggles, face shield |
| Hearing | Earplugs, earmuffs |
| Respiratory | Dust mask, respirator, SCBA |
| Hands | Gloves (leather, rubber, chemical-resistant) |
| Body | Apron, coverall, high-visibility vest |
| Feet | Safety shoes / boots |
| Fall protection | Safety harness, lanyard, lifeline |
The Factories Act §35 requires eye protection for processes involving glare or projectiles; §36 requires breathing apparatus for dangerous fumes; the Mines and BOCW Acts have similar provisions.
55.10 Safety Management Systems
Modern safety practice is structured through safety management systems — formal frameworks for managing safety as a continuous process. Three major standards:
| Standard | Origin | Coverage |
|---|---|---|
| OHSAS 18001 (now superseded) | British Standards Institute | Generic OHS management system |
| ISO 45001:2018 | International Standards Organisation | Successor to OHSAS 18001 — international standard |
| HSE Process Safety Management | UK Health & Safety Executive | Process industries (chemicals, refineries) |
ISO 45001 is built on the Plan-Do-Check-Act cycle and emphasises worker participation, risk-based thinking, and integration with business processes.
55.11 Famous Indian Industrial Disasters
Three industrial disasters have shaped Indian safety policy.
| Disaster | Year | Significance |
|---|---|---|
| Chasnala Mine Disaster | 1975 | 375 killed when water flooded a coal mine in Jharkhand |
| Bhopal Gas Tragedy | 1984 | Methyl isocyanate leak from Union Carbide; thousands killed; led to Chapter IVA of the Factories Act in 1987 |
| Vishakhapatnam Gas Leak | 2020 | Styrene leak from LG Polymers; multiple casualties; renewed safety scrutiny |
55.12 Practice Questions
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- Industrial accident = unexpected, in course of employment, with harm.
- Heinrich’s Domino Theory (1931) — five dominos; remove the unsafe act / condition.
- 80% accidents attributed to unsafe acts, 20% to unsafe conditions.
- Theories: domino, multiple causation, pure chance, accident-proneness, energy transfer (Haddon), Swiss cheese (Reason).
- Indicators: frequency rate, severity rate, incidence rate, LTIFR.
- Statutory notice: §88 Factories Act — 48 hours; §23 Mines Act.
- Safety Officer: 1,000+ workers or hazardous (Factories Act §40B); Safety Committee — §41G hazardous-process factories.
- Hierarchy of controls + PPE as last defence.
- ISO 45001:2018 — international OHS management standard.
- Famous disasters: Chasnala (1975), Bhopal (1984), Vishakhapatnam (2020).